bisecting fixing commit since 7e25f40eab52c57ff6772d27d2aef3640a3237d7 building syzkaller on c59079a693ad1d89c782f7db14b9f1c5629e2abc testing commit 7e25f40eab52c57ff6772d27d2aef3640a3237d7 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f51b4523c51aa937f87fdbae186d80e7a9abf6b2956573d4dca542ec94340cc4 run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #2: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #3: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #4: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #5: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #6: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #7: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #8: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #9: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #10: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #11: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #12: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #13: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #14: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #15: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #16: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #17: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata run #18: crashed: INFO: task hung in addrconf_dad_work run #19: crashed: INFO: task hung in addrconf_dad_work testing current HEAD b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 testing commit b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: cdda98f4e3aca931749080c7477a807e4902ab29ad5427d58c4fc0f721e2e8f1 all runs: crashed: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata revisions tested: 2, total time: 25m33.94272487s (build: 13m41.008788176s, test: 10m59.984858553s) the crash still happens on HEAD commit msg: Linux 5.19-rc2 crash: WARNING: ODEBUG bug in ieee80211_ibss_setup_sdata ------------[ cut here ]------------ ODEBUG: init active (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 1 PID: 20581 at lib/debugobjects.c:502 debug_print_object+0x16e/0x250 lib/debugobjects.c:502 Modules linked in: CPU: 0 PID: 20581 Comm: syz-executor.0 Not tainted 5.19.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:502 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 20 91 43 89 4c 89 ee 48 c7 c7 00 85 43 89 e8 2c 02 b5 04 <0f> 0b 83 05 65 7a 2b 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc900030b7478 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000616e81 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880b9f2792b R10: ffffed10173e4f25 R11: 0000000000002000 R12: ffffffff88ede1c0 R13: ffffffff89438a80 R14: ffffffff815e3210 R15: ffffffff8ef850a0 FS: 00007f8cded6f700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8cded4d108 CR3: 000000007a740000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_object_init+0x524/0xd10 lib/debugobjects.c:590 debug_timer_init kernel/time/timer.c:777 [inline] debug_init kernel/time/timer.c:825 [inline] init_timer_key+0x24/0x250 kernel/time/timer.c:869 ieee80211_ibss_setup_sdata+0x28/0x1b0 net/mac80211/ibss.c:1732 ieee80211_setup_sdata+0xc82/0x1060 net/mac80211/iface.c:1694 ieee80211_runtime_change_iftype net/mac80211/iface.c:1803 [inline] ieee80211_if_change_type+0x50e/0x6a0 net/mac80211/iface.c:1825 ieee80211_change_iface+0x50/0x330 net/mac80211/cfg.c:190 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline] cfg80211_change_iface+0x4a3/0xbf0 net/wireless/util.c:1078 nl80211_set_interface+0x426/0x840 net/wireless/nl80211.c:4041 genl_family_rcv_msg_doit+0x1e4/0x2f0 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:792 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2501 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x433/0x710 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x782/0xc30 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:734 __sys_sendto+0x1a5/0x270 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:2127 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x4193ec Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b RSP: 002b:00007f8cded6df80 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f8cded6e0f0 RCX: 00000000004193ec RDX: 0000000000000024 RSI: 00007f8cded6e140 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f8cded6dfd4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f8cded6e140 R14: 0000000000000005 R15: 0000000000000000